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-------------------------------------------------------------------------------
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-------------------------------------------------------------------------------
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--
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--
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-- SD/MMC Bootloader
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-- SD/MMC Bootloader
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-- Chip toplevel design with MMC feature set
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-- Chip toplevel design with MMC feature set
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--
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--
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-- $Id: chip-mmc-a.vhd,v 1.6 2005-04-07 20:44:23 arniml Exp $
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-- $Id: chip-mmc-a.vhd,v 1.7 2007-08-06 23:31:42 arniml Exp $
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--
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--
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-- Copyright (c) 2005, Arnim Laeuger (arniml@opencores.org)
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-- Copyright (c) 2005, Arnim Laeuger (arniml@opencores.org)
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--
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--
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-- All rights reserved, see COPYING.
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-- All rights reserved, see COPYING.
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--
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--
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architecture mmc of chip is
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architecture mmc of chip is
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component spi_boot
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component spi_boot
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generic (
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generic (
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width_set_sel_g : integer := 4;
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width_bit_cnt_g : integer := 6;
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width_bit_cnt_g : integer := 6;
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width_img_cnt_g : integer := 2;
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width_img_cnt_g : integer := 2;
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num_bits_per_img_g : integer := 18;
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num_bits_per_img_g : integer := 18;
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sd_init_g : integer := 0;
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sd_init_g : integer := 0;
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mmc_compat_clk_div_g : integer := 0;
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mmc_compat_clk_div_g : integer := 0;
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reset_level_g : integer := 0
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reset_level_g : integer := 0
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);
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);
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port (
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port (
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clk_i : in std_logic;
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clk_i : in std_logic;
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reset_i : in std_logic;
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reset_i : in std_logic;
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set_sel_i : in std_logic_vector(width_set_sel_g-1 downto 0);
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set_sel_i : in std_logic_vector(31-width_img_cnt_g-num_bits_per_img_g
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downto 0);
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spi_clk_o : out std_logic;
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spi_clk_o : out std_logic;
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spi_cs_n_o : out std_logic;
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spi_cs_n_o : out std_logic;
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spi_data_in_i : in std_logic;
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spi_data_in_i : in std_logic;
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spi_data_out_o : out std_logic;
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spi_data_out_o : out std_logic;
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spi_en_outs_o : out std_logic;
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spi_en_outs_o : out std_logic;
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signal spi_clk_s : std_logic;
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signal spi_clk_s : std_logic;
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signal spi_cs_n_s : std_logic;
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signal spi_cs_n_s : std_logic;
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signal spi_data_out_s : std_logic;
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signal spi_data_out_s : std_logic;
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signal spi_en_outs_s : std_logic;
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signal spi_en_outs_s : std_logic;
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signal set_sel_s : std_logic_vector(3 downto 0);
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constant width_img_cnt_c : integer := 2; -- 4 images
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constant num_bits_per_img_c : integer := 18; -- 256 kByte per image
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constant set_sel_width_c : integer := 31-width_img_cnt_c-num_bits_per_img_c;
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signal set_sel_s : std_logic_vector(set_sel_width_c downto 0);
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begin
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begin
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set_sel_s <= not set_sel_n_i;
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set_sel_s <= (3 => not set_sel_n_i(3),
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2 => not set_sel_n_i(2),
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1 => not set_sel_n_i(1),
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0 => not set_sel_n_i(0),
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others => '0');
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spi_boot_b : spi_boot
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spi_boot_b : spi_boot
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generic map (
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generic map (
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width_set_sel_g => 4, -- 16 sets
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width_bit_cnt_g => 12, -- 512 bytes per block
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width_bit_cnt_g => 12, -- 512 bytes per block
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width_img_cnt_g => 2, -- 4 images
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width_img_cnt_g => width_img_cnt_c,
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num_bits_per_img_g => 18, -- 256 kByte per image
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num_bits_per_img_g => num_bits_per_img_c,
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sd_init_g => 0, -- no SD specific initialization
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sd_init_g => 0, -- no SD specific initialization
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mmc_compat_clk_div_g => 13, -- MMC compat 400 kHz > 10 MHz / (13*2)
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mmc_compat_clk_div_g => 13, -- MMC compat 400 kHz > 10 MHz / (13*2)
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width_mmc_clk_div_g => 4 -- need 5 bits for MMC compat divider
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width_mmc_clk_div_g => 4 -- need 5 bits for MMC compat divider
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)
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)
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port map (
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port map (
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-------------------------------------------------------------------------------
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-------------------------------------------------------------------------------
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-- File History:
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-- File History:
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--
|
--
|
-- $Log: not supported by cvs2svn $
|
-- $Log: not supported by cvs2svn $
|
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-- Revision 1.6 2005/04/07 20:44:23 arniml
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-- add new port detached_o
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--
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-- Revision 1.5 2005/03/09 19:48:34 arniml
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-- Revision 1.5 2005/03/09 19:48:34 arniml
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-- invert level of set_sel input
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-- invert level of set_sel input
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--
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--
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-- Revision 1.4 2005/03/08 22:07:12 arniml
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-- Revision 1.4 2005/03/08 22:07:12 arniml
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-- added set selection
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-- added set selection
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